Write the letter of the matching definition next to each term.
1. niches
A. The sequence of events involved in the ___ development of a species or taxonomic group
2. parasitism
B. A flat grassland in tropical or subtropical regions
3. forest
C. Any of several eruptive skin diseases characterized by hard thick lesions grouped together
4. predator
D. The status of an organism within its environment and community (plural)
5. symbiosis
E. A vast treeless plain in the Arctic regions where the subsoil is permanently frozen
6. rainforest
F. A treeless grassy plain
7. prey
G. Animal hunted or caught for food
8. commensalism
H. The relation between two different species of organisms that are interdependent
9. steppe
I. A function in which an independent variable appears as an ___
10. evolution
J. Extensive plain without trees
11. mutualism
K. A process that saves organic substances from decay
12. prairie
L. A major biotic community characterized by the dominant forms of plant life and the prevailing
13. convergent
M. How tightly packed the matter in something is
14. lichen
N. Large area covered with trees
15. savanna
O. Land where ___ or ___ vegetation grows and is the dominant form of plant life (plural)
16. biome
P. The relation between two different kinds of organisms when one receives benefits from the other
17. grasslands
Q. The relation between two different kinds of organisms in which one receives benefits from the other
18. exponential
R. The relation between two different species of organisms that are interdependent
19. desert
S. Any animal that lives by preying on other animals
20. preservation
T. Dry land with very little rain
21. density
U. A following of one thing after another in time
22. tundra
V. A forest with heavy annual ___
23. succession
W. Tending to come together from different directions